android 自定义日历选择器

package com.maxus.ndk.myapplication; import android.content.Context; import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import android.util.AttributeSet; import android.util.Log; import android.util.TypedValue; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Calendar; import java.util.List; /** * Created by anxiaoniu 2022/0921 * 日历视图控件 */ public class CalendarView extends LinearLayout { /** * 日期信息实体类 **/ public class DayInfo { public int day; public DayType dayType; @Override public String toString() { return String.valueOf(day); } } /** * 日期类型 **/ public enum DayType { DAY_TYPE_NONE(0), DAY_TYPE_FORE(1), DAY_TYPE_NOW(2), DAY_TYPE_NEXT(3); private int value; DayType(int value) { this.value = value; } public int getValue() { return value; } } private Context context;//上下文对象 private TextView txtTitle;//标题文字 private TextView tvYear; private GridView dateGrid;//日期表格 private final Calendar calendar = Calendar.getInstance(); private static final int MAX_DAY_COUNT = 42;//最大格子数量 private DayInfo[] dayInfos = new DayInfo[MAX_DAY_COUNT];//每月应该有的天数，36为最大格子数 public CalendarView(Context context) { super(context); init(context);//初始化程序 showCalendar(calendar);//显示日历数据 } public CalendarView(Context context, AttributeSet attrs) { super(context, attrs); init(context);//初始化程序 showCalendar(calendar);//显示日历数据 } /** * 初始化程序 **/ private void init(Context context) { this.context = context; View rootView = View.inflate(context, R.layout.widget_calendar, null); dateGrid = rootView.findViewById(R.id.widgetCalendar_calendar); txtTitle = rootView.findViewById(R.id.widgetCalendar_txtTitle); tvYear = rootView.findViewById(R.id.tv_year); rootView.findViewById(R.id.widgetCalendar_imgForeYear) .setOnClickListener(navigatorClickListener); rootView.findViewById(R.id.widgetCalendar_imgForeMonth) .setOnClickListener(navigatorClickListener); rootView.findViewById(R.id.widgetCalendar_imgNextMonth) .setOnClickListener(navigatorClickListener); rootView.findViewById(R.id.widgetCalendar_imgNextYear) .setOnClickListener(navigatorClickListener); this.setOrientation(VERTICAL);//设置布局方向 this.addView(rootView);//添加根视图 } /** * 显示日历数据 **/ private void showCalendar(Calendar calendar) { int year = calendar.get(Calendar.YEAR);//获得年份 int month = calendar.get(Calendar.MONTH) + 1;//获取月份 // int day = calendar.get(Calendar.DATE);//获取天数 int centry = Integer.valueOf(String.valueOf(year).substring(0, 2));//取年份前两位作为世纪数,世纪数-1 int tmpYear = Integer.valueOf(String.valueOf(year).substring(2, 4));//取年份后两位 if (month == 1 || month == 2) {//该年的1、2月看作为前一年的13月，14月 tmpYear -= 1; month += 12; } //计算该月的第一天是星期几 int firstOfWeek = (tmpYear + (tmpYear / 4) + centry / 4 - 2 * centry + 26 * (month + 1) / 10) % 7; Log.d("wgx", "firstOfWeek=" + firstOfWeek); /** * 处理星期的显示 * */ if (firstOfWeek <= 0) { firstOfWeek = 7 + firstOfWeek; } /** * firstOfWeek可以显示从周一到周日 * firstOfWeek+1可以显示周日到周一 * */ firstOfWeek=firstOfWeek+1; Log.d("wgx", "firstOfWeek=" + firstOfWeek); //计算第一天所在的索引值,如果该天为星期一，则做换行处理 final int firstDayIndex = firstOfWeek == 1 ? 7 : firstOfWeek - 1; final int dayCount = getDayCount(year, month);//获取该月的天数 //处理本月的数据 for (int i = firstDayIndex; i < firstDayIndex + dayCount; i++) { if (dayInfos[i] == null) dayInfos[i] = new DayInfo(); dayInfos[i].day = i - firstDayIndex + 1; dayInfos[i].dayType = DayType.DAY_TYPE_NOW; } //处理前一个月的数据 calendar.add(Calendar.MONTH, -1);//前一个月 year = calendar.get(Calendar.YEAR);//获得年份 month = calendar.get(Calendar.MONTH) + 1;//获取月份 final int foreDayCount = getDayCount(year, month);//获得前一个月的天数 for (int i = 0; i < firstDayIndex; i++) { if (dayInfos[i] == null) dayInfos[i] = new DayInfo(); dayInfos[i].day = foreDayCount - firstDayIndex + i + 1; dayInfos[i].dayType = DayType.DAY_TYPE_FORE; } //处理下一个月的数据 for (int i = 0; i < MAX_DAY_COUNT - dayCount - firstDayIndex; i++) { if (dayInfos[firstDayIndex + dayCount + i] == null) dayInfos[firstDayIndex + dayCount + i] = new DayInfo(); dayInfos[firstDayIndex + dayCount + i].day = i + 1; dayInfos[firstDayIndex + dayCount + i].dayType = DayType.DAY_TYPE_NEXT; } calendar.add(Calendar.MONTH, 1);//还原月份数据 txtTitle.setText(new SimpleDateFormat("yyyy年MM月").format(calendar.getTime()));//设置日历显示的标题 dateGrid.setAdapter(new CalendarAdapter(context, dayInfos)); dateGrid.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Log.d("wgx","position==="+position); } }); } /** * 导航按钮点击事件 **/ private OnClickListener navigatorClickListener = new OnClickListener() { @Override public void onClick(View v) { switch (v.getId()) { case R.id.widgetCalendar_imgForeMonth://上一月 calendar.add(Calendar.MONTH, -1); break; case R.id.widgetCalendar_imgForeYear://上一年 calendar.add(Calendar.YEAR, -1); break; case R.id.widgetCalendar_imgNextMonth://下一月 calendar.add(Calendar.MONTH, 1); break; case R.id.widgetCalendar_imgNextYear://下一年 calendar.add(Calendar.YEAR, 1); tvYear.setText(calendar.get(Calendar.YEAR) + ""); break; } tvYear.setText(calendar.get(Calendar.YEAR) + ""); showCalendar(calendar);//显示日历数据 } }; /** * 是否是平年 **/ private boolean isLeapYear(int year) { return !((year % 4 == 0 && year % 100 != 0) || year % 400 == 0); } /** * 获取某年的某月有多少天 * * @param year * @param month * @return */ private int getDayCount(int year, int month) { switch (month) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: case 13://其实�